1202112001 has 4 divisors (see below), whose sum is σ = 1202187604. Its totient is φ = 1202036400.

The previous prime is 1202111987. The next prime is 1202112019. The reversal of 1202112001 is 1002112021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1002112021 = 139 ⋅7209439.

It can be written as a sum of positive squares in 2 ways, for example, as 407999601 + 794112400 = 20199^2 + 28180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202112001 - 2²⁷ = 1067894273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1202112071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3690 + ... + 49171.

It is an arithmetic number, because the mean of its divisors is an integer number (300546901).

Almost surely, 2^1202112001 is an apocalyptic number.

It is an amenable number.

1202112001 is a deficient number, since it is larger than the sum of its proper divisors (75603).

1202112001 is an equidigital number, since it uses as much as digits as its factorization.

1202112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75602.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1202112001 is about 34671.4868588008. The cubic root of 1202112001 is about 1063.2816304518.

Adding to 1202112001 its reverse (1002112021), we get a palindrome (2204224022).

The spelling of 1202112001 in words is "one billion, two hundred two million, one hundred twelve thousand, one".